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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.302 ·

claude mcp serve can report on tool calls and accept rules from the client

claude mcp serve gains a ReadCalls tool that reports on running and finished tool calls, and clients can pass in deny and ask rules

Use it now New Features
JSON All of v2.1.302
Use it nowTier: how much it should matter to you
4Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
MCPArea: what it touches
New FeaturesKind: in v2.1.302,
What probably matters to youSection of the release

Unclear Whether ReadCalls is available to every client of claude mcp serve or held behind a setting is not stated.

What

claude mcp serve runs Claude Code as an MCP server, so another program can connect to it and use its tools. A tool call is one use of a tool, such as running a command. Two things are new:

  • A tool named ReadCalls reports on tool calls that are running, finished or running in the background, and can be narrowed to a single call by its tool_use_id.
  • An experimental capability, anthropic/uploadsUnderSessionRules, and a repo_rules argument let the connecting program add its own deny and ask rules, which decide what is blocked and what needs approval.
Why

A program connected to claude mcp serve can now check on the state of calls and attach its own permission rules.

Read from
Names in the bundleclaude mcp serve
Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up claude mcp serve, on Connect Claude Code to tools via MCP. A `backgroundOutputPath` field in a Bash or PowerShell result from `claude mcp serve` means the call left its command running [in the background](/docs/en/tools-reference#background-commands). A command runs in the background when your cli… mcp see the edit
How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhether ReadCalls is available to every client of `claude mcp serve` or held behind a setting is not stated.
Anthropic's documentation agreesAnthropic's documentation has since written up claude mcp serve, on Connect Claude Code to tools via MCP.
Anthropic's release notes agreeFixed classifier_category missing from OpenTelemetry tool_decision events for most auto mode classifier blocks, and new tool_decision…

See this entry in the whole of v2.1.302 →

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